Patent GB-112020-A (GB)
Title: Improvements in and relating to Volume Correctors.
Inventor: LOUIS CENTENNIAL LOEWENSTEIN
IPC: G01F15/04
Filed: 1917-12-06
Abstract: 112,020. Loewenstein, L. C. Dec. 9, 1916, [Covention date]. Void [Published under Sect. 91 of the Act]. Calculating volumes of equal masses of air and gases under varying conditions.-The volume of air or gas under varying conditions equivalent in weight to a given volume of air or gas under stan. dard conditions of pressure, temperature, and humidity is determined. In the apparatus illustrated in Figs. 1 and 2, three pointers are adjusted by hand over scales of temperature, barometric pressure, and humidity, and mechanism is provided, so that, starting from standard conditions on each scale, the movements of the pointers contribute to the movement of a fourth pointer moving over a scale of equivalent volumes. The apparatus is mounted in a case 15 having guides in which slides a carriage 22 provided with guides for a sliding front plate 27. This plate is provided with a slot 28 through which projects a pointer 35 moving over a barometric scale, and the pointer may be clamped to the.plate by a screw 34. Carried at the back of the pointer is a gear-wheel 39 with a cam-slot. The wheel gears with a rack 42 fastened inside the carriage 22 and the cam slot engages a pin carrying a pointer 50. Pivoted at the bottom of the carriage is a bell-crank lever 56, 57, the short arm of which moves in a groove 60 on the front plate, while the long arm 57 has a pointer moving over a humidity scale. A clamping-screw 65 is provided for this lever. A pointer 66 on the carriage moves over a. temperature scale. Assuming the instrument set for standard conditions, the pointers 35, 66, and 61 will read say 29 inches, 60‹, and zero respectively. All the movable parts are clamped. To take a reading for other conditions, the clamping-screw 71 is first released and the carriage moved until the pointer 66 indicates the new temperature; when the screw is clamped again. Screws 34, 65 are subsequently operated and the pointers moved to new readings. The resultant of these movements is given by the pointer 50 in its scale. An application to the governing mechanism of a centrifugal compressor for blast furnaces is shown in Figs. 8 and 10. Air is admitted at 81 to a compressor 80 driven by a steam turbine 82. The valve mechanism of the turbine is operated by a fluid-actuated motor 84. The valve 94 of this motor is connected by links to a speed-governor 97 and to the usual graduated beam 85 pivoted at 86. A float 89, actuated by the flow of air which is to be controlled, depends from the beam and a weight 98 may be moved along it by a hand-operated screw. The beam is usually graduated for varying volumes at standard conditions. The longitudinal line A represents these conditions, and the distances from zero of the various graduations are proportional to the squares of the corresponding quantities of air. Slanting lines B are drawn, the vertical ordinates of which represent absolute temperatures, the point C representing absolute zero. The indicating instrument is combined with the weight 98, and barometric and humidity corrections are made by the mechanism of the instrument on the same scale as the temperature corrections.